Non-invasive method to objectively determine the dynamics of the tear film and diagnose dry- eye disease (DED)

A new system for the assessment of the tear film quality and the diagnosis of dry-eye has been developed. Based on a non-invasive recording of images of the light reflected on the tear-film of the eye, posterior image processing allows the objective assessment of dry-eye. It’s a simple and cost-effective system easy to use in clinics. Dry-eye disease is prevalent among 14.5% of population worldwide (17.9% in women and 10.% in men), which is expected to increase in developed countries with continuous aging. Dry eye occurs when the tear film which protect the ocular surface is injured and its normal function is disturbed. This multifactorial disease of the tear film and ocular surface results in symptoms of discomfort, visual disturbance and instability with potential damage to the ocular surface. There is an increasing difficulty in diagnosing the severity of the condition, as there are not too many modalities to diagnose it, the most common tests used in clinical practice for the diagnosis of dry-eye are either subjective, as questionnaires or invasive as the assessment of stability of tear film or its break-up time. In recent years great efforts have been made to develop objective and non-invasive methods for dry-eye analysis based on new technologies such as corneal topography, These methods are based in expensive instrumentation with the consequent impact in the cost of the tests for the patients.